Envelop.



L. ROVBLL. BNVELOP. APPLIOATION FILED DBGIQ, 1910.

1, 1 1 0,964. Patented Sept. 15, 1914.

Lwyf A201/fd. www@ f m5@ ,WM @M LLOYD ROVELL, OF HARRIETTE, MICHIGAN.

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Specication of Letters Patent. Application filed December 19, 1910.Serial 'Nd-597,897.

Patented Sept. 15, 1914..

To all whom t may concern Be it known that I, LLovD RovELL, a citizen ofthe United States of construction of envelop wherein efficient means areemployed to prevent the unsealing thereof by steaming. or likeoperations.

In the drawing, forming a portion of this Y specification and in whichlike numerals of reference indicate similar parts in the severalviews-Figure l is a plan view ofthe blank. Fig. 2 is a perspective viewof a portion of the sealing tongue showing the manner of folding theseal-forming element thereon. Fig. 8 is a similar view illustratinganother position of the parts in the folding of the said sealingelement. Fig. 4 is a plan view of a portion of the envelop showing thelocking Hap folded. Fig. 5 is a partial transverse section through theclosed envelop. i

The envelop is constructed from a blank l which includes the usual frontwall 2, the end flaps 3 and4, the bottom i'ap 5 and the sealing flap 6.Near one end of the iiap 3 is out a longitudinal slot 7 which registerswith a similar slot 8 in the flap 4 when the deps 3 and 4 are foldedover each other.

i An adhesive substance 9 is applied to the ap 3 at one side thereof andentirely snrrounds the slot 7. A. similar substance l0 is applied to oneside of the liap 4 to entirely surround the slot 8 therein.

The sealing flap 6 carries a substantially triangular extension 11 whichis folded on itself on the longitudinal line l2, then on the line 15 andthen on the transverse lines 13. From the illustration shown in Figs. 2and 3, it will be seen that when the extension is folded as described,it is provided with terminal pockets 14. The `terminals of the extensionmay be interlocked with each other by inserting the corner of oneterminal in the pocket 14 in the opposite terminal of the extension, asillustrated. From the con- America, resid.-A ing at Harriette, in thecounty ofWeXford have invented new` struction'it will be readilyunderstood that a novel form of sealing element 14 is Constructed.

In practice, the end flaps' of the envelop are folded to lie on eachother so as to cause the slots therein to register. The bottom flap isfolded to overlie one of the end iiaps and in a manner to cause thenlongitudinal slot l5 therein to coincidewith the slots in the endflaps. VIt will of course be understood that beforev folding the flapsas above specilied, the adhesive substance on each flap will benioistened so as to cause the liaps'to adhere to each other when theyare properly folded. When the end flaps and the bottom flap are folded,the sealingflap 6 may be folded to its closed position and the tonguethereof may be inserted 'through alining slots 7, 8 and 15'.. The foldedortions of the tongue engage the edges of the slots. Should an attemptbe made to withdraw the tongue, the sealing tongue would probably Aeo betorn from the body of the flap, indicating that such an attempt had beenmade. claim l An envelop having overlapped flaps provided with alinedslots, a sealing flap, and a triangular extension carried by the sealingflap and folded on itself in a longitudinal direction and irmnediatelyat the middle of said extension, the extension having intermediatetransverse weakened lines and outer transverse weakened lines', the saideXtension being folded on itself from said transverse lines whereby thefolded portions deiine pockets at the ends of the extension, the pocketforming portions being disposedrelativelyso that the pocket at one endreceives the opposite pocket end of the extension, the distance betweenthe intermediate weakened lines being equal to the length of the slotsso that the extension in its folded condition may be extended throughsaid slots, as and for the purpose specified. In testimony whereof IafliX my signature in presence of two witnesses.

LLOYD lRCVELL. Witnesses:

CLAUD W. BARRY, J oHN A. BARRY.

Commissioner ot :Patente Washington, D. C.

